/*
 * Copyright (c) 2020 New Vector Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package im.vector.app.features.widgets.permissions

import android.content.DialogInterface
import android.os.Bundle
import android.text.Spannable
import android.text.SpannableStringBuilder
import android.text.style.BulletSpan
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.airbnb.mvrx.MvRx
import com.airbnb.mvrx.activityViewModel
import com.airbnb.mvrx.withState
import im.vector.app.R
import im.vector.app.core.di.ScreenComponent
import im.vector.app.core.extensions.withArgs
import im.vector.app.core.platform.VectorBaseBottomSheetDialogFragment
import im.vector.app.databinding.BottomSheetRoomWidgetPermissionBinding
import im.vector.app.features.home.AvatarRenderer
import im.vector.app.features.widgets.WidgetArgs

import org.matrix.android.sdk.api.util.toMatrixItem
import javax.inject.Inject

class RoomWidgetPermissionBottomSheet :
        VectorBaseBottomSheetDialogFragment<BottomSheetRoomWidgetPermissionBinding>() {

    override fun getBinding(inflater: LayoutInflater, container: ViewGroup?): BottomSheetRoomWidgetPermissionBinding {
        return BottomSheetRoomWidgetPermissionBinding.inflate(inflater, container, false)
    }

    private val viewModel: RoomWidgetPermissionViewModel by activityViewModel()

    @Inject lateinit var avatarRenderer: AvatarRenderer

    override val showExpanded = true

    override fun injectWith(injector: ScreenComponent) {
        injector.inject(this)
    }

    // Use this if you don't need the full activity view model
    var directListener: ((Boolean) -> Unit)? = null

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        setupViews()
    }

    private fun setupViews() {
        views.widgetPermissionDecline.setOnClickListener { doDecline() }
        views.widgetPermissionContinue.setOnClickListener { doAccept() }
    }

    override fun invalidate() = withState(viewModel) { state ->
        super.invalidate()
        val permissionData = state.permissionData() ?: return@withState
        views.widgetPermissionOwnerId.text = permissionData.widget.senderInfo?.userId ?: ""
        views.widgetPermissionOwnerDisplayName.text = permissionData.widget.senderInfo?.disambiguatedDisplayName
        permissionData.widget.senderInfo?.toMatrixItem()?.also {
            avatarRenderer.render(it, views.widgetPermissionOwnerAvatar)
        }

        val domain = permissionData.widgetDomain ?: ""
        val infoBuilder = SpannableStringBuilder()
                .append(getString(
                        R.string.room_widget_permission_webview_shared_info_title
                                .takeIf { permissionData.isWebviewWidget }
                                ?: R.string.room_widget_permission_shared_info_title,
                        "'$domain'"))
        infoBuilder.append("\n")
        permissionData.permissionsList.forEach {
            infoBuilder.append("\n")
            val bulletPoint = getString(it)
            infoBuilder.append(bulletPoint, BulletSpan(resources.getDimension(R.dimen.quote_gap).toInt()), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        }
        infoBuilder.append("\n")
        views.widgetPermissionSharedInfo.text = infoBuilder
    }

    private fun doDecline() {
        viewModel.handle(RoomWidgetPermissionActions.BlockWidget)
        directListener?.invoke(false)
        // optimistic dismiss
        dismiss()
    }

    private fun doAccept() {
        viewModel.handle(RoomWidgetPermissionActions.AllowWidget)
        directListener?.invoke(true)
        // optimistic dismiss
        dismiss()
    }

    override fun onCancel(dialog: DialogInterface) {
        super.onCancel(dialog)
        viewModel.handle(RoomWidgetPermissionActions.DoClose)
    }

    companion object {

        fun newInstance(widgetArgs: WidgetArgs) = RoomWidgetPermissionBottomSheet().withArgs {
            putParcelable(MvRx.KEY_ARG, widgetArgs)
        }
    }
}
